CN105199748A - Alignment film, preparation method and liquid crystal panel of alignment film - Google Patents
Alignment film, preparation method and liquid crystal panel of alignment film Download PDFInfo
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- CN105199748A CN105199748A CN201510633573.2A CN201510633573A CN105199748A CN 105199748 A CN105199748 A CN 105199748A CN 201510633573 A CN201510633573 A CN 201510633573A CN 105199748 A CN105199748 A CN 105199748A
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- LYSXCDWZBFYRPG-UHFFFAOYSA-N [O-][N+](C1=CCCC=C1)=O Chemical compound [O-][N+](C1=CCCC=C1)=O LYSXCDWZBFYRPG-UHFFFAOYSA-N 0.000 description 1
- UATJOMSPNYCXIX-UHFFFAOYSA-N [O-][N+](c1cc([N+]([O-])=O)cc([N+]([O-])=O)c1)=O Chemical compound [O-][N+](c1cc([N+]([O-])=O)cc([N+]([O-])=O)c1)=O UATJOMSPNYCXIX-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/56—Aligning agents
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/02—Alignment layer characterised by chemical composition
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/02—Alignment layer characterised by chemical composition
- C09K2323/027—Polyimide
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133738—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homogeneous alignment
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
- G02F1/133761—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles
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Abstract
The invention relates to the technical field of liquid crystal, in particular to an alignment film used for a PSVA liquid crystal display panel. A first branch chain M and a second branch chain Q can be bonded on polyimide which serves as a main chain, so that the alignment film has a structural formula as shown in the specification, wherein the first branch chain M is a perssad which enables liquid crystal to deflect in a power distribution state; and the second branch chain Q is a perssad which contains nitrobenzophenone or benzoquinonyl. The invention also provides a liquid crystal display panel which comprises the alignment film. The problem of broken bright spots in the panel is solved effectively; and the quality of the panel is improved.
Description
Technical field
The present invention relates to LCD Technology field, especially the modified node method of its liquid crystal panel.
Background technology
In existing TFT-LCD indicating meter, VA (VerticalAlignment) display, with its wide angle of visibility, high-contrast and without the need to advantages such as friction matchings, becomes the common pattern of large size TV.VA is mainly divided into MVA (Multi-domianVerticalAlignment) technology, PVA (PatternedVertialAlignment) technology and CPA (ContinuouspinwheelAlignment).These VA technology, all need at CF (spectral filter) side design Protrusion (projection) or Slit (gap), while increase cost, also can reduce the light transmission rate of display screen, be implemented to by a control or line traffic control the problem controlled in face for solving CF side, create new VA technique of display, be called polymer stabilizing vertical orientation (PolymerStabilizationVerticalAlignment is called for short PSVA) technology.
The maximum feature of PSVA technology is on alignment film, generate the polymer layer that one deck can make VA Formation of liquid crystals tilt angle.Shown in Fig. 1 (a), common PSVA liquid crystal panel, comprises two substrates be oppositely arranged, the circuit card ITO that described substrate generally comprises outer field sheet glass G and is affixed on inside described sheet glass; The liquid crystal LC of photo polymerization monomer (RM, ReactiveMesogen) is provided with between described two substrates.Described RM this be a kind of phototaxis monomer containing double bond.Before UV rayed, first an additional voltage on two substrates, makes liquid crystal LC produce a tilt angle, and as shown in Fig. 1 (b), corresponding different farmlands, the vergence direction of liquid crystal molecule is different.After determining pretilt angle with impressed voltage, carry out specific UV rayed, at this moment, RM aggregates into polymer mesh structure RM ', attracts the liquid crystal molecule on top layer to make it to form fixing tilt angle (see Fig. 1 (c)); After UV has irradiated, remove impressed voltage, liquid crystal LC molecule still keeps the tilt angle (see Fig. 1 (d)) of certain angle.
But, RM is when UV light irradiates, Raolical polymerizable can be there is, if UV illuminance is too high, can can produce higher primary group of free radicals concentration in initial reaction stage, cause RM to react too fast, the particle diameter forming surperficial bump (convex protrusion formed after RM polymerization) can increase, thus cause the orientation of LC bad, there is broken bright spot.
At present, for addressing this problem, conventional method is in LC, add certain consumption (between usual 0.1%-1%) stopper, this kind of stopper mainly comprises following two types, one is phenols, and another kind is quinones, and their inhibition mechanism is shown below:
The inhibition essence of above-mentioned two kinds of stoppers is all reduce the number of free radical of RM when primary reaction, slows down the speed of response of RM, to reduce the particle diameter of bump, improves the homogeneity of bump dispersion.And in this two classes stopper, the stopper of which kind of type all can make the structure of self change, bisphenols can change diquines into, and benzoquinone's class can be transformed into the benzoquinone containing active group fragment.The change of this structure all can cause the change of LC physical property parameter, as △ n, △ etc., thus affects LC optical characteristics, reduces panel quality.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of alignment film for PSVA panel of LCD, being included in polyimide as bonding on main chain first side chain M, the second side chain Q, making alignment film have such as formula 1 structure;
Wherein, described first side chain M is the group for making described liquid crystal deflect under power status; Described second side chain Q is the group comprising nitrophenyl or benzoquinonyl; Described x, y represent the polymerization degree of described first side chain M, the second side chain Q respectively;
Described structural unit A is represented as:
Carbonatoms is no more than cycloalkyl group, aryl radical or the polycyclic aromatic alkyl of 12; Or
Carbonatoms is no more than cycloalkyl, aromatic base or the polycyclic aromatic base of 12, the one or more H atom on described cycloalkyl, aromatic base or polycyclic aromatic base by halogen atom, alkoxyl group or ester group replace.
Wherein, the ratio of the amount of substance of described first side chain M, the second side chain Q is 1:0.1 ~ 1; The amount of substance of the monomer corresponding to described main chain is not less than the amount of substance summation of the corresponding monomer of described first side chain M and the corresponding monomer of the second side chain Q.
Wherein, the second side chain Q be structure such as formula 2:
Described R
1represent carbon atom quantity be 2 ~ 10 alkyl or containing-O (CO)-and carbonatoms be 2 ~ 10 group or containing-N (CO)-and carbonatoms is the group of 2 ~ 10; Described group B represents benzoquinonyl or nitrophenyl.
Wherein, described group B structural formula is for such as formula shown in 4 or formula 5 or formula 6:
Wherein, the structure of described first side chain M is as shown in Equation 3:
Wherein, described R
2represent carbon atom quantity be 2 ~ 10 alkyl or containing-O (CO)-and carbonatoms be 2 ~ 10 group or containing-N (CO)-and carbonatoms is the group of 2 ~ 10; Described group E represents the group including 2 ~ 5 five-rings and/or six-ring and/or phenyl ring and/or the suitable company of condensed ring; R
3expression is the alkyl of 1 ~ 12 containing carbonatoms or is 1 ~ 12 containing carbonatoms, and H atom is by-F ,-Cl ,-CF
3,-CN ,-NCS ,-OCF
3the group that any one or more group replaces.
The present invention also provides this liquid crystal panel, comprises two substrates be oppositely arranged, is provided with the liquid crystal of photo polymerization monomer between described two substrates, and the side that described substrate is adjacent with described liquid crystal is also provided with the alignment film possessing said structure feature.
The present invention also provides the preparation method of this alignment film for PSVA panel of LCD, comprises the steps:
I, by a kind of dianhydride class monomer p with join in organic solvent containing the diamines monomer n of the first side chain, the diamines monomer m containing the second side chain, more than stirring reaction 24h, obtains alignment film presoma;
Wherein, described n:m=1:0.1 ~ 1 and p >=n+m;
II, described alignment film presoma is coated on substrate; Toast more than 30 minutes at 180 ~ 230 DEG C, make described alignment film presoma dehydration polymerization become polymkeric substance, form alignment film; Described alignment film to have at polyimide as the first side chain M, the second side chain Q described in bonding on main chain, has the structure such as formula 1;
Wherein, described first side chain M is the group for making described liquid crystal deflect under power status; Described second side chain Q is the group comprising nitrophenyl or benzoquinonyl; Described x, y represent the polymerization degree of described first side chain M, the second side chain Q respectively;
Described structural unit A is represented as:
Carbonatoms is no more than cycloalkyl group, aryl radical or the polycyclic aromatic alkyl of 12; Or
Carbonatoms is no more than cycloalkyl, aromatic base or the polycyclic aromatic base of 12, the one or more H atom on described cycloalkyl, aromatic base or polycyclic aromatic base by halogen atom, alkoxyl group or ester group replace.
Wherein, described organic solvent be in N-Methyl pyrrolidone solution, N-ethyl pyrrolidine, γ-hexalactone, dimethyl sulfoxide (DMSO) and methylene dichloride one or more.
Beneficial effect:
The present invention refers to that a group class with inhibition character connects on alignment film (PI) in the mode of short-side chain, the group on the one hand with inhibition character can stretch in LC and contact with RM, play the effect slowing down RM rate of polymerization, improve bump homogeneity, improve the problem of broken bright spot in panel; On the other hand, because this short-chain branch is fixed in the middle of described alignment film, make inhibition material not need directly to add in LC, effectively limit the structural modification after illumination of inhibition material and, on the impact of LC physical parameter, promote panel quality.
Accompanying drawing explanation
Fig. 1 is the workflow schematic diagram of existing PSVA display panels;
Fig. 2 is the structural representation of alignment film of the present invention.
Embodiment
Below, will describe in detail embodiments of the invention by reference to the accompanying drawings.
The invention provides a kind of novel alignment film material with inhibition character, this alignment film has such as formula 1 structure, and it comprises the first side chain M, the second side chain Q:
Wherein, described x, y represent the polymerization degree of described first side chain M, the second side chain Q respectively, and generally speaking formed alignment film molecular weight is 5 × 10
3~ 5 × 10
5; The scope of x, y can adjust according to the molecular weight of side chain, by the molecular weight control of alignment film in OK range.
Described structural unit A is represented as:
Carbonatoms is no more than cycloalkyl group, aryl radical or the polycyclic aromatic alkyl of 12; Or
Carbonatoms is no more than cycloalkyl, aromatic base or the polycyclic aromatic base of 12, the one or more H atom on described cycloalkyl, aromatic base or polycyclic aromatic base by halogen atom, alkoxyl group or ester group replace.。
The ratio of the amount of substance of described first side chain M, the second side chain Q is 1:0.1 ~ 1.In order to ensure that the first side chain M, the second side chain Q and main chain react completely, the amount of substance of the monomer corresponding to described main chain is not less than the amount of substance summation of the corresponding monomer of described first side chain M and the corresponding monomer of the second side chain Q.
Wherein, described first side chain M is the side chain containing phenyl ring etc. with rigid radical and chain alkyl, and its effect makes LC at initial state vertical orientated row's molecule row, the structure of described first side chain M as shown in Equation 3:
Wherein, described R
2represent carbon atom quantity be 2 ~ 10 alkyl or containing-O (CO)-and carbonatoms be 2 ~ 10 group or containing-N (CO)-and carbonatoms is the group of 2 ~ 10; Described group E represents the group including 2 ~ 5 five-rings and/or six-ring and/or phenyl ring and/or the suitable company of condensed ring; R
3expression is the alkyl of 1 ~ 12 containing carbonatoms or is 1 ~ 12 containing carbonatoms, and H atom is by-F ,-Cl ,-CF
3,-CN ,-NCS ,-OCF
3the group that any one or more group replaces.
Described second side chain Q is the side chain containing inhibition property and structure, and it comprises the group of nitrophenyl or benzoquinonyl.The structure that second side chain Q is is as shown in Equation 2:
Described R
1represent carbon atom quantity be 2 ~ 10 alkyl or containing-O (CO)-and carbonatoms be 2 ~ 10 group or containing-N (CO)-and carbonatoms is the group of 2 ~ 10; Described group B represents that benzoquinonyl or nitrophenyl etc. have the group of inhibition character.
Such as, benzoquinones class as to two benzoquinones, is shown in formula 4:
Oil of mirbane (see formula 5) or a trinitrobenzene (see formula 6), as:
In order to make inhibition obtain best effect, generally benzoquinonyl or nitre phenyl being connected to the end of the second side chain Q, at utmost to contact, to slow down the speed of response of RM with RM, to reduce the particle diameter of bump, improving the homogeneity of bump dispersion.
Alignment film structure of the present invention can be illustrated as shown in Figure 2, and in real work, the first longer side chain M maintains the stable alignment effect to LC; The second shorter side chain Q provides inhibition.Second side chain Q mono-aspect can stretch in LC and contact with RM, plays the effect slowing down RM rate of polymerization, improve bump homogeneity; On the other hand, because this second side chain is fixed in the middle of described alignment film, make inhibition material not need directly to add in liquid crystal, effectively limit inhibition material and remain in amount in LC after illumination transforms, the subsequent quality of LC is guaranteed.
Below, the preparation method of alignment film of the present invention will be introduced.
A kind of dianhydride class monomer p (is polymerized to the monomer molecule before the main chain of this enforcement, enumerate as Suo Shi reaction formula 7 (a)) with monomer molecule n (a kind of diamines monomer before being polymerized corresponding to the first side chain M, enumerate as Suo Shi reaction formula 7 (b)), monomer molecule m (a kind of diamines monomer before polymerization corresponding to second side chain Q, enumerate as Suo Shi reaction formula 7 (c)), first side chain M, the ratio of the monomer molecule amount of substance that the second side chain Q is corresponding is respectively n:m=1:0.1 ~ 1, in the present embodiment, the amount of substance of dianhydride class monomer is not less than n, m sum.
The monomer molecule that described first side chain M, the second side chain Q is corresponding is respectively dissolved in organic solvent N-Methyl pyrrolidone (NMP) solution, wherein NMP accounts for the mass percent of described alignment film solution is 90 ~ 95% (solvent for use can also be N-ethyl pyrrolidine, γ-hexalactone, dimethyl sulfoxide (DMSO) and methylene dichloride one or more), at room temperature stirring reaction 24 hours, obtain alignment film presoma polyamic acid (PAA, as Suo Shi reaction formula 7 (d));
And then described PAA is coated on a substrate, under the condition of 180 ~ 230 DEG C, toast 30min, while solvent is fully volatilized, also make PAA be dehydrated into ring, form PI film.
Adopt the PSVA liquid crystal panel that this alignment film is formed, it comprises two substrates be oppositely arranged, the liquid crystal of photo polymerization monomer is provided with between described two substrates, the side that described substrate is adjacent with described liquid crystal is also provided with alignment film, described alignment film is included in polyimide as bonding on main chain first side chain M, the second side chain Q, and alignment film is had such as formula 1 structure and effect thereof.
Claims (8)
1. for an alignment film for panel of LCD, it is characterized in that, be included in polyimide as bonding on main chain first side chain M, the second side chain Q, make alignment film have such as formula 1 structure;
Wherein, described first side chain M is the group for making described liquid crystal deflect under power status; Described second side chain Q is the group comprising nitrophenyl or benzoquinonyl; Described x, y represent the polymerization degree of described first side chain M, the second side chain Q respectively;
Described structural unit A is represented as:
Carbonatoms is no more than cycloalkyl group, aryl radical or the polycyclic aromatic alkyl of 12; Or
Carbonatoms is no more than cycloalkyl, aromatic base or the polycyclic aromatic base of 12, the one or more H atom on described cycloalkyl, aromatic base or polycyclic aromatic base by halogen atom, alkoxyl group or ester group replace.
2. alignment film according to claim 1, is characterized in that, the ratio of the amount of substance of described first side chain M, the second side chain Q is 1:0.1 ~ 1; The amount of substance of the monomer corresponding to described main chain is not less than the amount of substance summation of the corresponding monomer of described first side chain M and the corresponding monomer of the second side chain Q.
3. alignment film according to claim 1 and 2, is characterized in that, the structure of the second side chain Q is such as formula 2:
Described R
1represent that carbon atom quantity is the alkyl of 2 ~ 10 or is the group of 2 ~ 10 containing-O (CO)-or-N (CO)-and carbonatoms; Described group B represents benzoquinonyl or nitrophenyl.
4. alignment film according to claim 3, is characterized in that, described group B structural formula is for such as formula shown in 4 or formula 5 or formula 6:
5. alignment film according to claim 1 and 2, is characterized in that, the structure of described first side chain M as shown in Equation 3:
Wherein, described R
2represent that carbon atom quantity is the alkyl of 2 ~ 10 or is the group of 2 ~ 10 containing-O (CO)-or-N (CO)-and carbonatoms; Described group E represents the group including 2 ~ 5 five-rings and/or six-ring and/or phenyl ring and/or the suitable company of condensed ring; R
3expression is the alkyl of 1 ~ 12 containing carbonatoms or is 1 ~ 12 containing carbonatoms, and H atom is by-F ,-Cl ,-CF
3,-CN ,-NCS ,-OCF
3the group that any one or more group replaces.
6. a liquid crystal panel, comprise two substrates be oppositely arranged, be provided with the liquid crystal of photo polymerization monomer between described two substrates, the side that described substrate is adjacent with described liquid crystal is also provided with alignment film, it is characterized in that, described alignment film is the alignment film described in claim 1-5 any one.
7. for a preparation method for the alignment film of panel of LCD, it is characterized in that, comprise the steps:
I, by dianhydride class monomer p with join in organic solvent containing the diamines monomer n of the first side chain, the diamines monomer m containing the second side chain, more than stirring reaction 24h, obtains alignment film presoma;
Wherein, described n:m=1:0.1 ~ 1 and p >=n+m;
II, described alignment film presoma is coated on substrate; Toast more than 30 minutes at 180 ~ 230 DEG C, make described alignment film presoma dehydration polymerization become polymkeric substance, form alignment film; Described alignment film to have at polyimide as the first side chain M, the second side chain Q described in bonding on main chain, has the structure such as formula 1;
Wherein, described first side chain M is the group for making described liquid crystal deflect under power status; Described second side chain Q is the group comprising nitrophenyl or benzoquinonyl; Described x, y represent the polymerization degree of described first side chain M, the second side chain Q respectively;
Described structural unit A is represented as:
Carbonatoms is no more than cycloalkyl group, aryl radical or the polycyclic aromatic alkyl of 12; Or
Carbonatoms is no more than cycloalkyl, aromatic base or the polycyclic aromatic base of 12, the one or more H atom on described cycloalkyl, aromatic base or polycyclic aromatic base by halogen atom, alkoxyl group or ester group replace.
8. the preparation method of alignment film according to claim 7, is characterized in that, described organic solvent is in N-Methyl pyrrolidone solution, N-ethyl pyrrolidine, γ-hexalactone, dimethyl sulfoxide (DMSO) and methylene dichloride one or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633573.2A CN105199748B (en) | 2015-09-29 | 2015-09-29 | A kind of alignment film, preparation method and its liquid crystal panel |
| PCT/CN2015/093099 WO2017054274A1 (en) | 2015-09-29 | 2015-10-28 | Alignment film, manufacturing method and liquid crystal panel thereof |
| US14/894,930 US10093859B2 (en) | 2015-09-29 | 2015-10-28 | Alignment film, preparation method and liquid crystal display panel |
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| CN201510633573.2A CN105199748B (en) | 2015-09-29 | 2015-09-29 | A kind of alignment film, preparation method and its liquid crystal panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319083A (en) * | 2018-02-11 | 2018-07-24 | 深圳市华星光电半导体显示技术有限公司 | A kind of display module and manufacturing method |
| CN106188540B (en) * | 2016-07-12 | 2019-01-22 | 深圳市华星光电技术有限公司 | Alignment film material and the production method of alignment film, liquid crystal display panel and preparation method thereof |
| CN111117666A (en) * | 2019-12-18 | 2020-05-08 | Tcl华星光电技术有限公司 | Alignment film, preparation method thereof and display panel |
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| US20190250436A1 (en) * | 2018-02-11 | 2019-08-15 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display assembly and manufacturing method thereof |
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Also Published As
| Publication number | Publication date |
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| US10093859B2 (en) | 2018-10-09 |
| US20170190973A1 (en) | 2017-07-06 |
| WO2017054274A1 (en) | 2017-04-06 |
| CN105199748B (en) | 2017-10-17 |
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